There are six types of pronouns to consider:

(2) relative pronoun: A relative pronoun relates to another noun preceding it in the sentence. In doing so, it connects a dependent clause to an antecedent (i.e., a noun that precedes the pronoun.) Therefore, a relative pronoun acts as the subject or object of the dependent clause.

(3)indefinite pronoun: Indefinite pronouns refer to an unknown or undetermined person, place or thing.

(4) demonstrative pronoun: Demonstrative pronouns stand in for a person, place or thing that must be pointed to. They may function as subjects, objects or objects of the preposition.

(5) interrogative pronoun: Interrogative pronouns are aptly named. They basically stand in for the answer to the question being asked.